The majority of the people use Bitcoin for investment purposes, and not as a currency tool.
Exactly that. I find a lot people here to be very hypocrite as they say that people should start spending their coins, but not do so themselves as they don't want to spend their coins as they believe the price will increase. People are free to do whatever they want with their coins. If one person wants to hold its coins for 5 years without using them, then it's fine. If other people prefer to spend everything they have, then it's fine too. But only let people focus on themselves instead of telling others that what they do is wrong, while in fact that's exactly what they themselves are doing.
What we can offer them is just a suggestion because it's true that we are only in control of our bitcoins, and those who listen on people who tells not to spent it are not having their own decision. They have to understand that bitcoin is freedom so it's up to us on how to use it.